S50

SIP Yeastar S50 VoIP PBX support 4 onboard module slots Users:50, Max. Concurrent Calls:25, Max. Analog Ports:8, Max. GSM/3G/4G ports:4, VoIP Trunks:50 External Storage SD Card, Firewall, T.38 Fax, Hot Standby, Built-in call recording capability Aveilable Modules: S2 two FXS Ports (add 2 analog telephones), O2 two FXO Ports (2 analog PSTN (POTS) lines) SO 1 FXS Port & 1 FXO Port, B2 2 BRI Ports, GSM 1 GSM Channel, 3G 1 WCDMA Channel, 4G 3G/4G Voice Call & Data Default Delivery without any Module !! Protocol: SIP (RFC3261), IAX2, Transport Protocol: UDP, TCP, TLS, SRTP Codec: G711, G722, G726, G729A, GSM, Speex, ADPCM, iLBC, H263, H263P, H264, MPEG4 DTMF: In-band, RFC4733, RFC2833, SIP INFO IP Services: Static IP, DHCP, VPN, Firewall, VLAN, DDNS, PPPoE, QoS, Static NAT, STUN Ethernet Interfaces: 2 × 10/100 Mbps , Voicemail: 5000 min (expandable) Power: 100-240VAC-50/60Hz /18W , Size: 340x210x44mm / 1.5Kg